From: Bernard Metzler <bmt@zurich.ibm.com>
Date: Mon, 9 Sep 2019 15:24:27 +0200
Subject: RDMA/siw: Fix page address mapping in TX path
Patch-mainline: v5.4-rc1
Git-commit: 0404bd629fd4d05e7ab815e6e1ecd81e728678d3
References: jsc#SLE-8381
Use the correct kmap()/kunmap() flow to determine page address used for
CRC computation. Using page_address() is wrong, since page might be in
highmem.
Fixes: b9be6f18cf9e ("rdma/siw: transmit path")
Link: https://lore.kernel.org/r/20190909132427.30264-1-bmt@zurich.ibm.com
Reported-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/sw/siw/siw_qp_tx.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
@@ -518,11 +518,12 @@ static int siw_tx_hdt(struct siw_iwarp_t
c_tx->mpa_crc_hd,
iov[seg].iov_base,
plen);
- } else if (do_crc)
- crypto_shash_update(
- c_tx->mpa_crc_hd,
- page_address(p) + fp_off,
- plen);
+ } else if (do_crc) {
+ crypto_shash_update(c_tx->mpa_crc_hd,
+ kmap(p) + fp_off,
+ plen);
+ kunmap(p);
+ }
} else {
u64 va = sge->laddr + sge_off;